Improvement in door-knob attachments



S. S. NUES.

noon-KNOB ATTACHMENT. No.177,8`77.. Patented my 23,1876.

E l d ...Weyl

PATENT Carton.

SIDNEY S. NILES, OF OAK PARK,ILLINOIS.

IMPROVEMENT |N DooR- KNOB ATTACHMENTS.

Specification forming part of Letters Patent No. 177,877, dated May 23, 1876 application tiled March 20, 1876.

To all Iwhom it may concern:

Be it known that I, SIDNEY S. NILEs, of Oak Park, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Door Knobs, which is fully described in the following specification, reference being had to the accompanying drawings, in Which- Figure-1 represents a sectional View of the door with one of my knobs applied. Fig. 2 represents an end view of one of the knobs removed from the door. Fig. 3 represents a detached "iew of the rose, showing the end of its slotted shank. Fig. 4 represents the end of the knob-shank, showing its lug, and the rose-shank, showing the slot which receives the lug, as hereinafter specified. Fig. 5 shows a side View of the screw7threaded ring, to which the rose of the knob is attached; and Fig. 6 is a View ot' a part of the lock detached from the door, showing` the screw-threaded ring forming a part of the lock-plate.

My invention relates to that class of doorknobs that are attached to a spindle, that passes through the lock in such manner that the spindle can be turned from either side of the door to open. y

The invention consist-s in the peculiar construction and combination of the rose, knobshank, and attaching screw-threaded rings, as will be hereinafter fully` set forth.

In the accompanying drawings, A vrepresents the door; B, the mortised lock. D is a metal ring having an interior screw-thread, and is made either a part of the lock-plate, as shown in Fig. 6, or with flanges E, as shown in Fig. 5. F is 'a metal door-knob rose,lhav ing a cylindrical projection, Gr, with an eXterior screw-thread adapted to fit the screw in the ring D.

It will be observed that the ring D projects either from the look-plate, or is held in the door by its flanges E, so that when the cylindrical projection G is screwed to said ring the rose F is securely fastened to the door.

The knob C has a shank,H, provided with a lug, I, and the metal rose F is provided with a hollow shank, J, with an interior slot, K, which receives the lug I. L is the spindle, which passes loosely through the lock B, in such a` manner as to turn the catch of the lock when it is turned ,with it. This spindle lits into the shank H of the door-knob, one end fitting into the shank of the knob on one side ofthe door, the other end in the shank of the opposite knob.

It will be observed that, if the rose F is screwed entirely down to its place` on the door before the knob is put in place, the knob and prevents the knob from being removed in all ordinary usages of the lock.

When the ring D constitutes a part of the lock-plate, it is not sufticiently wide to be flush with the side ot' the door, as shown in Fig. l, but is made narrower, so as to pass into the mortise at the edge of the door.

The different parts ot' the knob are rmly secured in this manner together and to the door, and the fastenings which secure them are very strong, and they can be taken apart only by turning the rose F so as to partially or Wholly unscrew it from the ring D.

Having thus fully described the construction and operation of my invention, what I claim, and desire to secure by Letters Patent, 1s

The combination ot' the screw-threaded ring D, rose F, constructed with a threaded projecting ring, Gr, slot K, and shoulder M, and the knob-shank H, provided with a lug, I, substantially as described.

SIDNEY S. NILES. Witnesses:

HEINRICH F. BRUNS, L. M. HARRIS. 

